Muscles Of The Trunk Ad Neck

Front 1

RECTUS ABDOMINUS

Back 1

NERVE: Intercostal nerves
ATTACHMENTS: Pubis TO THE Xiphoid Process & Cartilages of ribs 5-7
ACTIONS:
- Flexes trunk @ spinal joints
- Posteriorly tilts pelvis @ Lumbosacral joints

Front 2

EXTERNAL ABDOMINAL OBLIQUE

Back 2

NERVE: Intercostal nerves
ATTACHMENTS: Anterior illiac crest, pubic bone, & abdominal aponeurosis TO THE lower 8 ribs (5-12)
ACTIONS:
- Flexes trunk @ spinal joints
- Posteriorly tilts pelvis @ Lumbosacral joints
- Laterally flexes trunk @ spinal joints
- Contralaterally rotates trunk @ spinal joints

Front 3

INTERNAL ABDOMINAL OBLIQUE

Back 3

NERVE: Intercostal nerves
ATTACHMENTS: Inguinal ligament, illiac crest, thoracolumbar fascia TO THE lower 3 ribs (10-12) & Abdominal aponeurosis
ACTIONS:
- Flexes trunk @ spinal joints
- Posteriorly tilts pelvis @ Lumbosacral joints
- Laterally flexes trunk @ spinal joints
- Ipsilaterally rotates trunk @ spinal joints

Front 4

TRANSVERSUS ABDOMINUS

Back 4

NERVE: Intercostal nerves
ATTACHMENTS: Inguinal ligament, illiac crest, & thoracolumbar fascia & lower costal cartilages (7-12) TO abdominal aponeurosis
ACTIONS:
- Compress abdominal contents

Front 5

EXTERNAL INTERCOSTALS

Back 5

NERVE: Intercostal nerves
ATTACHMENTS: Intercostal spaces of ribs 1-12
ACTIONS:
- Elevates ribs 2-12 @ the sternocostal & costospinal joints

Front 6

INTERNAL INTERCOSTALS

Back 6

NERVE: Intercostal Nerves
ATTACHMENTS: In the intercostal spaces of ribs 1-12
ACTIONS:
- Depresses ribs 1-11 @ the sternocostal & spinalcostal joints

Front 7

DIAPHRAGM

Back 7

NERVE: Intercostal Nerves
ATTACHMENTS: Entire Muscle: internal surfaces of the ribcage & sternum, and the spine TO THE Central tendon of the diaphragm
ACTIONS:
- Increases the volume of the thoracic cavity

Front 8

LONGUS COLLI

Back 8

NERVE: Cervical Spinal Nerves
ATTACHMENTS: Entire Muscle: C3-T3 Vertebrae TO THE Entire Muscle: C1- C6 Vertebrae
ACTIONS:
- Flexes the neck @ the spinal joints

Front 9

SCALENES

Back 9

NERVE: Cervical Spinal Nerves
ATTACHMENTS: Entire Group: TP's of cervical spine TO THE 1st & 2nd rib
ACTIONS:
- Flexes the neck @ the spinal joints
- Laterally Flexes the neck @ the spinal joints
- Elevates 1st & 2nd Rib @ sternalcostal & costospinal joints

Front 10

PLATYSMA

Back 10

NERVE: Facial Nerve CN VII
ATTACHMENTS: Subcutaneous fascia of the superior chest TO THE mandible & subcutaneous fascia of the lower face
ACTIONS:
- Draws up skin of neck & superior chest

Front 11

STERNOCLEIDOMASTOID

Back 11

NERVE: Spinal Accessory Nerve CN XI
ATTACHMENTS: Manubrium of sternum & medial clavicle TO THE Mastoid process of temporal bone
ACTIONS:
- Flexes neck @ spinal joints
- Laterally flexes neck & head @ spinal joints
- Contralaterally rotates neck & head @ spinal joints